Diamond Clarity

The clarity of a diamond is measured by its inclusions. The inclusions in a diamond can vary from a large mineral crystal in the table to the tiniest chip on the pavilion. The less noticeable the inclusions are, the better the clarity grade of the diamond and the more rare and valuable it is. A diamond’s clarity can range from Flawless to Included and a trained gemologist will consider a variety of factors, such as the size, number and location of the inclusions to determine where in the clarity scale a diamond will fall. At NADB we’ve chosen only to broker diamonds with clarity grades between Flawless and SI2 in order to avoid diamonds with large eye-visible inclusions. Here are some helpful definitions to understand clarity grades:

FLAWLESS, INTERNALLY FLAWLESS (FL & IF)

Flawless diamonds have the highest clarity grade. They contain no inclusions or blemishes. They are free from even the smallest of scratches. Internally Flawless diamonds have no inclusions, but contain small blemishes on the surface, such as a scratch or polish lines.

VERY VERY SLIGHTLY INCLUDED (VVS1 & VVS2)

Diamonds with VVS clarity are rare and have inclusions so small even a trained gemologist will have trouble finding them with a microscope.

VERY SLIGHTLY INCLUDED (VS1 & VS2)

Diamonds with VS clarity have minor inclusions that are small and can be difficult to find with magnification. VS clarity is considered well above average.

SLIGHTLY INCLUDED (SI1, SI2, & SI3)

SI clarity diamonds have noticeable inclusions under magnification, but will usually look clean when viewed with the naked eye. Occasionally SI2 clarity diamonds will have eye-visible inclusions. At NADB we always check with the dealers to ensure diamonds are eye-clean before we send them to you

INCLUDED (I1, I2, I3)

These diamonds have very obvious inclusions, easily visible both with the naked eye and under magnification. This group is also characterized by poor transparency and a lack of brilliance.